RS232\u4e0eUSART\u662f\u4e32\u884c\u901a\u4fe1\u63a5\u53e3\u4e2d\u5e38\u89c1\u7684\u4e24\u79cd\u6807\u51c6\uff0c\u5b83\u4eec\u5728\u7535\u6c14\u7279\u6027\u3001\u6570\u636e\u4f20\u8f93\u901f\u7387\u7b49\u65b9\u9762\u6709\u4e00\u4e9b\u660e\u663e\u7684\u533a\u522b\u3002\u672c\u6587\u5c06\u5bf9RS232\u4e0eUSART\u8fdb\u884c\u8be6\u7ec6\u6bd4\u8f83\u548c\u89e3\u91ca\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u5b83\u4eec\u4e4b\u95f4\u7684\u533a\u522b\u3002<\/p>\n
RS232\u662f\u4e00\u79cd\u4e32\u884c\u901a\u4fe1\u6807\u51c6\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u8ba1\u7b97\u673a\u548c\u5916\u8bbe\u4e4b\u95f4\u7684\u8fde\u63a5\u3002\u5b83\u4f7f\u7528\u4e86\u4e00\u6839\u6570\u636e\u7ebf\u548c\u4e00\u6839\u63a7\u5236\u7ebf\uff0c\u80fd\u591f\u5b9e\u73b0\u5168\u53cc\u5de5<\/a>\u901a\u4fe1\u3002RS232\u901a\u5e38\u7528\u4e8e\u8fde\u63a5\u8c03\u5236\u89e3\u8c03<\/a>\u5668\u3001\u6253\u5370\u673a\u3001\u8ba1\u7b97\u673a\u7ec8\u7aef\u7b49\u8bbe\u5907\u3002<\/p>\n
RS232\u4fe1\u53f7\u4f7f\u7528\u6b63\u8d1f\u903b\u8f91\u7535\u5e73\u8868\u793a\u903b\u8f910\u548c\u903b\u8f911\uff0c\u5e76\u4e14\u4fe1\u53f7\u4ee5\u8d1f\u7535\u5e73\u8868\u793a\u903b\u8f911\uff0c\u6b63\u7535\u5e73\u8868\u793a\u903b\u8f910\u3002\u7535\u5e73\u8303\u56f4\u4e3a-15V\u81f3+15V\uff0c\u4f7f\u5f97RS232\u4fe1\u53f7\u5177\u6709\u5f88\u5f3a\u7684\u6297\u5e72\u6270\u80fd\u529b\u3002<\/p>\n
RS232\u6807\u51c6\u652f\u6301\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u4e00\u822c\u572820kbps\u81f31Mbps\u4e4b\u95f4\uff0c\u9002\u7528\u4e8e\u8f83\u77ed\u8ddd\u79bb\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n
USART\u662f\u901a\u7528\u540c\u6b65\/\u5f02\u6b65\u6536\u53d1\u4f20\u8f93\u5668(Universal Synchronous\/Asynchronous Receiver\/Transmitter)\u7684\u7f29\u5199\uff0c\u5b83\u662f\u4e00\u79cd\u4e32\u884c\u901a\u4fe1\u534f\u8bae\uff0c\u53ef\u4ee5\u5b9e\u73b0\u540c\u6b65\u6216\u5f02\u6b65\u901a\u4fe1\u3002USART\u5728\u5fae\u63a7\u5236\u5668\u548c\u5916\u8bbe\u4e4b\u95f4\u7684\u8fde\u63a5\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u7684\u5e94\u7528\u3002<\/p>\n
\u4e0eRS232\u4e0d\u540c\uff0cUSART\u4fe1\u53f7\u4f7f\u75280V\u548cVCC\u8868\u793a\u903b\u8f910\u548c\u903b\u8f911\u3002USART\u7684\u7535\u5e73\u53ef\u4ee5\u6839\u636e\u7cfb\u7edf\u7684\u7535\u538b\u6765\u8c03\u6574\uff0c\u56e0\u6b64\u6bd4RS232\u66f4\u7075\u6d3b\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u7535\u538b\u6807\u51c6\u3002<\/p>\n
USART\u6807\u51c6\u652f\u6301\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u8303\u56f4\u975e\u5e38\u5e7f\u6cdb\uff0c\u4ece\u51e0\u5341bps\u5230\u51e0\u5341Mbps\u4e0d\u7b49\uff0c\u53ef\u4ee5\u6ee1\u8db3\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e0b\u7684\u901f\u7387\u9700\u6c42\u3002<\/p>\n
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